Re-generate fair scheduler design doc PDF

Details

Description

The Fair Scheduler contains a design document in src/contrib/fairscheduler/designdoc that is included both as a Latex file and as a PDF. However, the PDF that's currently there is not generated properly and has some question marks for section references. I'd like to regenerate it and commit the new one. There is no patch to attach because this just requires running pdflatex and committing a binary file.